Morse code of SOS is repeated 3 times (· · ·) short and 3 times (― ― ―) long. You can transmit this signal as sound or in any form that can be transmitted. If you can't make a sound You just need to transmit a signal with light It would be nice to have a tool that can emit light like a flashlight. If there is no situation, you can use a mobile phone program to send a rescue signal with light. First, the Morse code program. ↑ Press the OFF button on the first screen. ↑ Check the light and press the "SOS Infinite Loop" button. It then transmits the SOS light signal indefinitely until the user stops. * General usage ↓ Enter the text to be converted to Morse code in the text input field. ↓ Enter text and Morse code will be displayed as shown below. ↑ Select the type of signal to transmit. Choose 1 from sound, vibration, or light, or all the signals you want. ↓ If you select light, you can select the color of the light by pressing the color palette button. ↑ Press the Start